Two models from Tickle Abuse are my favorites that I'd love to see in more videos, now that they're more mature:
1) Terri the Therapist, desperately ticklish, and apparently only able (and willing) to get through a session with no safeword. A vociferous begger and protester who had the habit of of breaking the fourth wall by begging the camera man and whoever else was there to "Get her off me!!" and "Make her stop!". Gorgeous, very ticklish and very reluctant to actually laugh, opting to scream and swear.
2) Carmen the Asian girl, also very ticklish and intense begger who amusingly kink-shames her tormentors for being freaks and weird.
I guess what made these girls special is that the two special is the feeling that they were not really ok with being tickled, even if they consented to it.
I'd love to see the older selves of these ladies face a return of their nightmares.